java AES加密示例

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.util.Scanner;

public class TestAES {

    public static void main(String[] args) throws Exception {
        System.out.println("输入需要加密的消息：");
        Scanner input = new Scanner(System.in);
        String message= input.nextLine();
        KeyGenerator kgen = KeyGenerator.getInstance("AES");//初始化密匙生成器
        kgen.init(128); 
        
        SecretKey skey = kgen.generateKey();//生成**
        Cipher cipher = Cipher.getInstance("AES");//初始化加密器
        cipher.init(Cipher.ENCRYPT_MODE, skey);
        byte[] encrypted = cipher.doFinal((message).getBytes());//加密
        System.out.println("加密后的消息: " + new String(encrypted));    
        
        cipher.init(Cipher.DECRYPT_MODE, skey);
        byte[] original = cipher.doFinal(encrypted);//解密
        String originalString = new String(original);
        System.out.println("解密后的消息: " +originalString);
        input.close();
  }
}

测试结果：